1
00:00:00,180 --> 00:00:07,380
First, we have to find out what the term electrostatic actually means, so here are again our Maxwell's

2
00:00:07,380 --> 00:00:09,190
equations from the previous section.

3
00:00:10,140 --> 00:00:16,050
So there were four of these equations and two of them were related to the electric field and the other

4
00:00:16,050 --> 00:00:18,310
two were related to the magnetic field.

5
00:00:19,290 --> 00:00:25,350
And so, as you may expect already, by the term electrostatic, we are here only concerned with the

6
00:00:25,350 --> 00:00:26,430
electric fields.

7
00:00:27,510 --> 00:00:35,560
And furthermore, since the term includes static's, it means that our fields E and B, our time independent.

8
00:00:35,910 --> 00:00:41,430
So this means that this term here, the partial derivative of the magnetic field with respect to time

9
00:00:41,970 --> 00:00:43,100
is equal to zero.

10
00:00:43,860 --> 00:00:49,830
So this means here we only consider with these two equations here that the divergence of the electric

11
00:00:49,830 --> 00:00:56,600
field is basically given by the charged density, which which is position dependent.

12
00:00:56,610 --> 00:00:59,010
So it could be zero of our.

13
00:00:59,640 --> 00:01:03,770
And the other equation would be that the rotation of E is zero.

14
00:01:05,040 --> 00:01:11,250
And then, of course, according to these differential formulations of these two equations, we can

15
00:01:11,250 --> 00:01:14,610
also express here the integral formulations.

16
00:01:15,150 --> 00:01:23,220
So the first one looks as before and the second one is here, zero on the right side, because this

17
00:01:23,220 --> 00:01:25,980
time derivative of the magnetic field is zero.
